Index: /trunk/src/org/openstreetmap/josm/actions/downloadtasks/DownloadOsmTask.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/actions/downloadtasks/DownloadOsmTask.java	(revision 13611)
+++ /trunk/src/org/openstreetmap/josm/actions/downloadtasks/DownloadOsmTask.java	(revision 13612)
@@ -297,5 +297,5 @@
                     layer = getFirstModifiableDataLayer();
                 }
-                Collection<OsmPrimitive> primitivesToUpdate = searchPrimitivesToUpdate(bounds, layer.data);
+                Collection<OsmPrimitive> primitivesToUpdate = searchPrimitivesToUpdate(bounds, layer.getDataSet());
                 layer.mergeFrom(dataSet);
                 MapFrame map = MainApplication.getMap();
Index: /trunk/src/org/openstreetmap/josm/actions/downloadtasks/DownloadReferrersTask.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/actions/downloadtasks/DownloadReferrersTask.java	(revision 13611)
+++ /trunk/src/org/openstreetmap/josm/actions/downloadtasks/DownloadReferrersTask.java	(revision 13612)
@@ -120,5 +120,5 @@
         }
 
-        DataSetMerger visitor = new DataSetMerger(targetLayer.data, parents);
+        DataSetMerger visitor = new DataSetMerger(targetLayer.getDataSet(), parents);
         visitor.merge();
         SwingUtilities.invokeLater(targetLayer::onPostDownloadFromServer);
Index: /trunk/src/org/openstreetmap/josm/actions/downloadtasks/DownloadTaskList.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/actions/downloadtasks/DownloadTaskList.java	(revision 13611)
+++ /trunk/src/org/openstreetmap/josm/actions/downloadtasks/DownloadTaskList.java	(revision 13612)
@@ -290,5 +290,5 @@
             final OsmDataLayer editLayer = MainApplication.getLayerManager().getEditLayer();
             if (editLayer != null && osmData) {
-                final Set<OsmPrimitive> myPrimitives = getCompletePrimitives(editLayer.data);
+                final Set<OsmPrimitive> myPrimitives = getCompletePrimitives(editLayer.getDataSet());
                 for (DownloadTask task : tasks) {
                     if (task instanceof DownloadOsmTask) {